I want to know if this is correct for what they are asking. If I try to put 7.5% in the int= spot it errors. I am a newbie who doesn't quite understand it all.

The commission rate in the firstmethod will be entered as a decimal value (for example,
a 7.5% rate will be entered as 0.075).A second method will be included that takes the same salesvalue as the first method, but has the commission rate entered as an integer (for example, 7 would be entered for 7%.). This commission value is then divided by 100.0, the
sales figure is multiplied by the result of that calculation,and the final result is displayed to the user.


[code]

public class Commission
{

public static void main(String[] args)

{

double sales = 45000.0;
double commission = 0.0;
int rate = 5;
commission = computeCommission(sales, rate);
System.out.println("Commission on sales of "
+ sales
+ " with a rate of " + rate + "%"
+ " is "
+ commission);
double drate = 7.5;
commission = computeCommission(sales, drate);
System.out.println("Commission on sales of "
+ sales
+ " with a rate of " + drate + "%"
+ " is "
+ commission);

}

public static double computeCommission(double s, double r)
{

return (( (double) r / 100.0) * s);

}

public static double computeCommission(double s, int r)

{

return (( (double) r / 100.0) * s);

}

}

[/code}

What errors do you get? Does the program compile, run? Do you get the desired results?

if i put int= .075 which would be 7.5% it says possible loss of precision
found:double
required int:int
int rate=.075
^

You say that the rate argument in any version of your computeCommission is measured in % .

Since in both cases you divide the input by 100 means that you assume if you
input 3 you mean 3% --> 0.03
input 3.0 you mean 3.0% --> 0.03
input 4.5 you mean 4.5% --> 0.045

So if you want the rate to be 0.45 (45/100 --> 45%) then the input should be:
computeCommission(double s, 45) or computeCommission(double s, 45.00)

So if you want the rate to be 0.06 (6/100 --> 6%) then the input should be:
computeCommission(double s, 6) or computeCommission(double s, 6.00)

So if you want the rate to be 0.053 (5.3/100 --> 5.3%) then the input should be:
computeCommission(double s, 5.3)

You say:
If you want 7.5% (0.075) then you should input: computeCommission(double s, 7.5)

You get the error because int rate is an int variable and you cannot store non integer values. In int rate you must put only ints. If you do int rate=0.99999, the the rate will have value 0 in the end.

Thanks for that info. I will try it and let you know if it works. That makes more sense to me than this book...lol